I was reading this article, which is about how cigarettes are bad (groundbreaking) and marijuana is good. At least, if you believe the Swiss. They are neutral. We can trust them.
Instead of reading the whole article, because obviously you're at work and supposed to be working, allow me to supply the pertinent quote:
"In contrast to those who shunned both substances, the pot-only crowd was more likely to be male (71.6 to 47.7 percent); have a good relationship with friends (87 versus 83.2 percent); and play sports (85.5 versus 76.6 percent)...they do not seem to have great personal, family or academic problems."
The study also pointed out that potsmokers were less likely to have good relationships with their parents, but I think that we can pretty safely attribute that to the taboo.
I don't really partake in pot any more, but it's more because I'm too lazy to go find some than due to any real aversion. In fact, side note, I don't know if you know this, but marijuana binds to the receptor for a naturally occurring ligand called anandamide. That's the chemical that's thought to be released during runner's high, and also interestingly enough has a whole lot to do with pregnancy: it plays a role in getting the egg into the womb and is a key chemical communicator between a mother and her embryo.
So to recap: smoking pot will make you more likely to have good friendships, and the high is like your very first experience of your mother's love. Good thing that shit's illegal!